Did you notice D6 FW 1.1 is now available for download? They mention fixing the following issue in the previous FW: "The AF fine-tuning options item could be used to store only one set of fine-tuning values for AF-S NIKKOR 180-400mm f/4E TC1.4 FL ED VR lenses: users could store either values for use with the built-in teleconverter or values for use without, but not both."
This afternoon, I could only store one set of corrections (wide, tele), which I found rather strange. I downloaded the new firmware. So, tomorrow, a new complete session is planned, as I don’t know which corrections I stored (without or with TC)
Very nice of them! I like the lens hood design 
Do enjoy! Hope you get some good locations where it makes sense
Thank you Erik. The location is well known. The question is that, presently, I’m using a combination of 70-200mm f/2.8E FL, TC-2.0, and 500mm f/5.6E PF, to cover the range of the 180-400 mm TC 1.4, and which worked out in a lighter and more affordable package. While now, I will have a f/4 aperture to cover the 200-400 mm range i.e. 1 stop better for a race which will 50% of the time during the night. Not entirely convinced by the solution for the time being, but we shall see
And I can still fall back on the “old” solution.
